A truss integral lifting bridge high pier climbing formwork device and construction method

Abstract

A truss integral lifting type bridge high pier climbing formwork device and construction method, four embedded climbing rail fixing parts on the rectangular corners of the bridge pier are all provided with climbing rails, the upper end of the climbing rail is provided with a top truss operating platform, the lower end is provided with a climbing rail anchor bolt, an outer formwork is provided between two circumferentially adjacent climbing rails, an inner formwork is provided on the inner side of the outer formwork, an outer formwork truss operating platform is provided on the outer side of the climbing rail, a hydraulic jacking mechanism is provided between the outer formwork truss operating platform and the climbing rail, the outer formwork truss operating platform is connected to the top truss operating platform through a first hydraulic lifting mechanism, an inner formwork truss operating platform is provided on the inner side of the inner formwork, and the inner formwork truss operating platform is connected to the top truss operating platform through a second hydraulic lifting mechanism; the construction method comprises installing the climbing rails and the top truss operating platform; lifting the outer formwork and the outer formwork truss operating platform and pouring the pier body solid transition section concrete; climbing rail jacking; installing the inner formwork and the inner formwork truss operating platform; constructing the standard section of the bridge pier body; and dismantling the entire structure.